Testing, Java, NiFi, MQM Protocol, Database

We need somebody that can help us with testing of our IoT Device Manager. We have NiFi, a database and devices using MQTT protocol. We need somebody that are very familiar with NiFi and custom processors as well as database and MQTT, We need somebody that have experinces we IoT devices , device management and NiFi that can help us to make different test cases. We need somebody that is familiar with device managment and MQTT. We do not need a wen developer.